As a country Australia is sending far more SMS messages than we were just a couple of years back. Below we take a look at some of the emerging trends and staggering figures that highlight the growth of mobile phone usage across Australia.Did you know that in 2010 there was a 300% increase in overall SMS/MMS message volumes across the country? Everyone, from young children to old grandparents, knows how to send a text message today.Figures compiled by mobicity.com show that most Australians spend 35 minutes a day sending text messages. In 2010, 8 million text messages were sent across Australia on Valentine’s Day. Teenagers send on average 5 text messages a day – 83% of all Australian teens own a mobile phone.Half of these teens do not turn their phone off at night and a quarter of them admit to replying to texts they receive at night immediately: 10% of these teens admit to receiving text messages that wake them up each night.